<title>分硬币</title><link href="http://hzoi.com/tomorrow.css" rel="stylesheet"><div class="ui existing segment"><pre><code><span class="pl-cp">#include</span><span class="pl-cpf">&lt;cstdio&gt;</span><span class="pl-cp"></span>
<span class="pl-cp">#include</span><span class="pl-cpf">&lt;cstring&gt;</span><span class="pl-cp"></span>
<span class="pl-kt">int</span> <span class="pl-nf">main</span><span class="pl-p">()</span> <span class="pl-p">{</span>
	<span class="pl-n">freopen</span><span class="pl-p">(</span><span class="pl-s">&quot;coin.in&quot;</span><span class="pl-p">,</span><span class="pl-s">&quot;r&quot;</span><span class="pl-p">,</span><span class="pl-n">stdin</span><span class="pl-p">);</span>
	<span class="pl-n">freopen</span><span class="pl-p">(</span><span class="pl-s">&quot;coin.out&quot;</span><span class="pl-p">,</span><span class="pl-s">&quot;w&quot;</span><span class="pl-p">,</span><span class="pl-n">stdout</span><span class="pl-p">);</span>
    <span class="pl-kt">int</span> <span class="pl-n">coin</span><span class="pl-p">[</span><span class="pl-mi">105</span><span class="pl-p">],</span><span class="pl-n">n</span><span class="pl-p">;</span>
    <span class="pl-n">scanf</span><span class="pl-p">(</span><span class="pl-s">&quot;%d&quot;</span><span class="pl-p">,</span> <span class="pl-o">&amp;</span><span class="pl-n">n</span><span class="pl-p">);</span>
    <span class="pl-k">while</span><span class="pl-p">(</span><span class="pl-n">n</span><span class="pl-o">--</span><span class="pl-p">){</span>
        <span class="pl-kt">int</span> <span class="pl-n">m</span><span class="pl-p">,</span><span class="pl-n">sum</span> <span class="pl-o">=</span> <span class="pl-mi">0</span><span class="pl-p">,</span><span class="pl-n">DP</span><span class="pl-p">[</span><span class="pl-mi">50005</span><span class="pl-p">];</span>
        <span class="pl-n">scanf</span><span class="pl-p">(</span><span class="pl-s">&quot;%d&quot;</span><span class="pl-p">,</span> <span class="pl-o">&amp;</span><span class="pl-n">m</span><span class="pl-p">);</span>
        <span class="pl-k">for</span><span class="pl-p">(</span><span class="pl-kt">int</span> <span class="pl-n">i</span> <span class="pl-o">=</span> <span class="pl-mi">0</span><span class="pl-p">;</span> <span class="pl-n">i</span> <span class="pl-o">&lt;</span> <span class="pl-n">m</span><span class="pl-p">;</span> <span class="pl-n">i</span><span class="pl-o">++</span><span class="pl-p">)</span> <span class="pl-p">{</span>
            <span class="pl-n">scanf</span><span class="pl-p">(</span><span class="pl-s">&quot;%d&quot;</span><span class="pl-p">,</span> <span class="pl-o">&amp;</span><span class="pl-n">coin</span><span class="pl-p">[</span><span class="pl-n">i</span><span class="pl-p">]);</span>
            <span class="pl-n">sum</span> <span class="pl-o">+=</span> <span class="pl-n">coin</span><span class="pl-p">[</span><span class="pl-n">i</span><span class="pl-p">];</span>
        <span class="pl-p">}</span>
        <span class="pl-n">DP</span><span class="pl-p">[</span><span class="pl-mi">0</span><span class="pl-p">]</span> <span class="pl-o">=</span> <span class="pl-mi">1</span><span class="pl-p">;</span>
        <span class="pl-k">for</span><span class="pl-p">(</span><span class="pl-kt">int</span> <span class="pl-n">i</span> <span class="pl-o">=</span> <span class="pl-mi">0</span><span class="pl-p">;</span> <span class="pl-n">i</span> <span class="pl-o">&lt;</span> <span class="pl-n">m</span><span class="pl-p">;</span> <span class="pl-n">i</span><span class="pl-o">++</span><span class="pl-p">)</span>
            <span class="pl-k">for</span><span class="pl-p">(</span><span class="pl-kt">int</span> <span class="pl-n">j</span> <span class="pl-o">=</span> <span class="pl-n">sum</span><span class="pl-p">;</span> <span class="pl-n">j</span> <span class="pl-o">&gt;=</span> <span class="pl-n">coin</span><span class="pl-p">[</span><span class="pl-n">i</span><span class="pl-p">];</span> <span class="pl-n">j</span><span class="pl-o">--</span><span class="pl-p">)</span>
                <span class="pl-k">if</span><span class="pl-p">(</span><span class="pl-n">DP</span><span class="pl-p">[</span><span class="pl-n">j</span><span class="pl-o">-</span><span class="pl-n">coin</span><span class="pl-p">[</span><span class="pl-n">i</span><span class="pl-p">]])</span>
                    <span class="pl-n">DP</span><span class="pl-p">[</span><span class="pl-n">j</span><span class="pl-p">]</span> <span class="pl-o">=</span> <span class="pl-mi">1</span><span class="pl-p">;</span>
        <span class="pl-k">for</span><span class="pl-p">(</span><span class="pl-kt">int</span> <span class="pl-n">i</span> <span class="pl-o">=</span> <span class="pl-n">sum</span><span class="pl-o">/</span><span class="pl-mi">2</span><span class="pl-p">;</span> <span class="pl-n">i</span> <span class="pl-o">&gt;=</span> <span class="pl-mi">0</span><span class="pl-p">;</span> <span class="pl-n">i</span><span class="pl-o">--</span><span class="pl-p">)</span>
            <span class="pl-k">if</span><span class="pl-p">(</span><span class="pl-n">DP</span><span class="pl-p">[</span><span class="pl-n">i</span><span class="pl-p">])</span> <span class="pl-p">{</span>
                <span class="pl-n">printf</span><span class="pl-p">(</span><span class="pl-s">&quot;%d</span><span class="pl-se">\n</span><span class="pl-s">&quot;</span><span class="pl-p">,</span> <span class="pl-n">sum</span> <span class="pl-o">-</span> <span class="pl-mi">2</span><span class="pl-o">*</span><span class="pl-n">i</span><span class="pl-p">);</span>
                <span class="pl-k">break</span><span class="pl-p">;</span>
            <span class="pl-p">}</span>
    <span class="pl-p">}</span>
    <span class="pl-k">return</span> <span class="pl-mi">0</span><span class="pl-p">;</span>
<span class="pl-p">}</span>
</cpde></pre></div>